由于多轴数控机床几何误差控制参数较为单一，辨识结果存在效率低的问题，为此提出多轴数控机床几何误差变动区域高效辨识方法。分析多轴数控机床的几何结构、运动原理以及误差项，以理想运动特征矩阵为对比项，建立多轴数控机床空间定位误差模型，以不同多轴数控机床的装配误差情况为输入值，增加几何误差控制参数；在该多轴数控机床空间定位误差模型下，安装几何误差检测辨识设备，以误差源为中心计算得出对应的误差量，从平动和转角两个方面获得多轴数控机床几何误差变动区域的辨识结果。实验结果表明：所提方法的辨识精度更高、消耗时间更短，应用效率得到保证。

Due to the single geometric error control parameters of multi axis CNC machine tools, the identification results are inefficient. Therefore, an efficient identification method for geometric error variation region of multi axis CNC machine tools is proposed. The geometric structure, motion principle and error term of multi axis CNC machine tool are analyzed. The ideal motion characteristic matrix is taken as the contrast term to establish the spatial positioning error model of multi axis CNC machine tool. The assembly error of different multi axis CNC machine tools is taken as the input value, and the geometric error control parameters are added. Under the spatial positioning error model of multi axis CNC machine tool, the geometric error detection and identification device is installed. In addition, the corresponding error is calculated with the error source as the center, and the identification results of geometric error variation area of multi axis CNC machine tool are obtained from translation and rotation angle. The experimental results show that the identification accuracy of the proposed method is higher, the consumption time is shorter, and the application efficiency is guaranteed.